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Increasing role of electricity energy in economical development and living level of human societies is unavoidable. Over these recent years the environmental issues such as increase of Pollutants, the global warming, the establishment of strict laws of environmental issues and international protocols like Kyoto in 1997 and Copenhagen in 2009, also economical issues like the fluctuation of the oil...
Trend of reconfiguration of power system is leading to smart grids which are absolutely best possible solution for future power systems. Future smart grids, including Distributed Generation (DG) units, encounter a broad range of challenges like metering, management, and control. In this paper, architecture for fuzzy multi-agent based control for voltage regulation in smart grid is proposed. To investigate...
Based on mathematical modeling and numerical simulations, the control strategy for a solid oxide fuel cell hybrid system (SOFC-HS) is presented. Adequate maps of performances with three independent parameters are shown. The independent parameters are as follows: stack current, fuel mass flow and turbine-compressor shaft speed. Those parameters can be controlled by external load, fuel valve and turbine-compressor...
Renewable energy sources (RES), including wind power plants, have high priority of promotion in the energy policy of the European Union as well as in Poland. An increasing share of RES and distributed generation (DG), should, as has been assumed, provide improvement in reliability of electricity delivery to the customers. Paper presented here concentrates on the problem of availability of RES improvement...
In the time of rapid changes in power industry the need to develop new power systems arises. The newly developed systems should aim at wide utilisation of renewable power sources and CO2-neutral technologies. This goal can be achieved by e.g. dissipated generation, or integrating DG into microgrids. The microgrids can be built using AC or DC current networks. Authors propose DC microgrid as a new...
There are two main trends in present development of power systems. First is a wide utilization of renewable power resources. The second is decentralization of power generation. Hence, small power sources, very often RES sources, called dissipated power generators are developed. They are usually in range of megawatts starting form kilowatts. They operate automatically and are remotely controlled. In...
Some specialists claim that present power systems come to the end. The first of all reason is fossil fuels run low. One of the solutions allows avoiding the problem is local balancing of power production and power demand. The easiest to reach local non fossil carriers are wind, sun and water and biomass energy. But they are unstable and it is very hard to produce stable power from them. Microglia's...
Nowadays, in many countries the increase of generating capacity takes place in small units of so-called distributed power industry (distributed generation). In the paper are presented: the experiences from exploitation of hybrid solar- wind power plant; concept of solar power plant with fuel cell. This last solution enables optimal utilization of primary energy sources and increases the level of supply...
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